package net.zjitc.servlet.request;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Author Administrator
 * @Date 2020/5/15 11:07
 **/
@WebServlet("/forwardServlet1")
public class ForwardServlet1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("forwardServlet1.....");
        /*request域共享数据
        请求转发（一次请求）之间共享数据
        存储数据
         */
        req.setAttribute("msg","haha");
        /*请求转发：服务器内部的一种资源跳转方式，由多个Servlet来共同处理一个请求*/
        RequestDispatcher requestDispatcher = req.getRequestDispatcher("/forwardServlet2");
        requestDispatcher.forward(req,resp);
        /*转发只能是内部进行，无法转发到外部资源*/

    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doGet(req,resp);
    }


}
